package etelligens.com.foodsafety.utils;

import static android.content.Context.MODE_PRIVATE;

import static etelligens.com.foodsafety.utils.Keyword.PREF_LANG;

import android.annotation.TargetApi;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.os.Build;
import android.preference.PreferenceManager;
import android.util.Log;

import java.util.Locale;

public class LocaleHelper {

    private static final String TAG="LocaleHelper";
    private static final String PREF_NAME = "LangData";

    public static Context onAttach(Context context) {
        String lang = getPersistedData(context, Locale.getDefault().getLanguage());
        Log.e(TAG,"onAttach=="+"language=="+lang);
        return setLocale(context, lang);
    }

    public static String getLanguage(Context context) {
        Log.e(TAG,"getLanguage");
        return getPersistedData(context, Locale.getDefault().getLanguage());
    }

    public static Context setLocale(Context context, String language) {
        persist(context, language);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            return updateResources(context, language);
        }
        return updateResourcesLegacy(context, language);
    }

    private static String getPersistedData(Context context, String defaultLanguage) {
        SharedPreferences preferences = context.getSharedPreferences(PREF_NAME,MODE_PRIVATE);
        return preferences.getString(PREF_LANG, defaultLanguage);
    }

    private static void persist(Context context, String language) {
        SharedPreferences preferences =  context.getSharedPreferences(PREF_NAME,MODE_PRIVATE);
        SharedPreferences.Editor editor = preferences.edit();
        editor.putString(PREF_LANG, language);
        Log.e(TAG,"addLangToPref");
        Log.e(TAG,"language=="+language);
        editor.apply();
    }

    @TargetApi(Build.VERSION_CODES.N)
    private static Context updateResources(Context context, String language) {
        Locale locale = new Locale(language);
        Locale.setDefault(locale);
        Configuration configuration = context.getResources().getConfiguration();
        configuration.setLocale(locale);
        configuration.setLayoutDirection(locale);
        Log.e(TAG,"updateResources");
        return context.createConfigurationContext(configuration);
    }

    @SuppressWarnings("deprecation")
    private static Context updateResourcesLegacy(Context context, String language) {
        Locale locale = new Locale(language);
        Locale.setDefault(locale);
        Resources resources = context.getResources();
        Configuration configuration = resources.getConfiguration();
        configuration.locale = locale;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            configuration.setLayoutDirection(locale);
        }
        resources.updateConfiguration(configuration, resources.getDisplayMetrics());
        return context;
    }
}